Home / 72,776.28-100,432.85-40,512.56

Finding the Fourth Proportional to 72,776.28, 100,432.85 and 40,512.56

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Solution

The fourth proportional to 72,776.28, 100,432.85 and 40,512.56 is: 55,908.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,776.28 : 100,432.85 = 40,512.56 : x
  2. Step 2: Convert to fraction form
    72,776.28/100,432.85 = 40,512.56/x
  3. Step 3: Cross multiply
    72,776.28x = 100,432.85 × 40,512.56
  4. Step 4: Simplify right side
    72,776.28x = 4,068,791,910.12
  5. Step 5: Solve for x
    x = 4,068,791,910.12/72,776.28
  6. Step 6: Final answer
    x = 55,908.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.